Tinbergen, Niko, 1907- <br/><br/>
Signals for survival 
Niko Tinbergen and Hugh Falkus ; drawings by Eric Ennion 
 - Oxford  Clarendon Press  1970 
 - 80 p. ; 29 cm. 
<br/><br/> Based on the film'Signals for survival' by Niko Tinbergen and Hugh Falkus, commissioned by the British Broadcasting Corporation. 
<br/><br/><label>ISBN: </label>0198573499 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lesser black--backed gull<br/>Animal communication<br/>Birds--Behavior